def solve():
    x, y, z = map(int, input().split())
    m = {'A':x, 'B':y, 'C':z}
    s0, t0 = input().split()
    t0 = int(t0)
    s1, t1 = input().split()
    t1 = int(t1)
    X = {"A", "B", "C"} - {s0, s1}
    X = X.pop()
    if s0 == s1:
        print(abs(t0 - t1))
    else:
        ans = [0] * 4
        ans[0] = t0 - 1 + t1
        ans[1] = m[s0] - t0 + m[s1] - t1
        ans[2] = t0 - 1 + m[X] + m[s1] - t1
        ans[3] = m[s0] - t0 + m[X] + t1
        print(min(ans))
solve()